DS3170N+ Maxim Integrated Products, DS3170N+ Datasheet - Page 38
DS3170N+
Manufacturer Part Number
DS3170N+
Description
IC TXRX DS3/E3 100-CSBGA
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3170.pdf
(230 pages)
Specifications of DS3170N+
Function
Single-Chip Transceiver
Interface
DS3, E3
Number Of Circuits
1
Voltage - Supply
3.135 V ~ 3.465 V
Current - Supply
120mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
100-LBGA
Includes
DS3 Framers, E3 Framers, HDLC Controller, On-Chip BERTs
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
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Figure 8-2. Tx Line IO HDB3 Functional Timing Diagram
8.3.1.2
There is no suggested time alignment between the RXP, RXN and RX LINE signals and the RLCLK clock signal.
The RX DATA signal is not an always readily available signal, it is meant to represent the data value of the other
signals. The signal on RSER in framed mode will be the same as the RX DATA signal except delayed.
The RXP and RXN pins are only available when the line is in B3ZS/HDB3 or AMI mode and the LIU is enabled.
The RPOS, RNEG and RLCLK pins are only available when the line is in B3ZS/HDB3 or AMI mode and the LIU is
disabled.
The RPOS and RNEG signals are sampled at the rising edge of the reference clock signal if the clock pin is not
inverted, otherwise they are sampled at the negative edge. The RLCLK clock pin is the clock reference used for the
RPOS and RNEG signals. The RPOS and RNEG pins can be inverted.
RXP and RXN are differential analog input pins. They are biased around ½ VDD and pulse above and below the
bias voltage by about 1 Volt with zero cable length. These signals are connected to the windings of a 1:2 step up
transformer and the other winding of the transformer is connected to the RX LINE signal. The RX LINE signal is a
bipolar signal that pulses about 1 Volt positive and 1 Volt negative above and below ground (0 volts) with zero
cable length. See
Figure 8-3
Figure 8-3. Rx Line IO B3ZS Functional Timing Diagram
(TX DATA)
(RX DATA)
(TX LINE)
(RX LINE)
TLCLK
RLCLK
TNEG
TPOS
RNEG
RPOS
TXN
TXP
RXP
RXN
B3ZS/HDB3/AMI Mode Receive Pin Functional Timing
and
Figure 8-4
0 V
0 V
BIAS V
BIAS V
Figure 2-1
+
+
show the relationship between the analog and the digital outputs.
-
-
for a diagram of the external connections.
B
B
B
B
B
B
B
B
38 of 230
V
V
V
V
V
V
V
V
HDB3 CODEWORD
B3ZS CODEWORD
DS3170 DS3/E3 Single-Chip Transceiver
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